[Python] tkinter 之 Listbox & Combobox

示例：

 1 #用户界面
 2 import os
 3 os.chdir('F:\\spyder_workspace\\ColCal')
 4 import Main
 5 from tkinter import *
 6 from tkinter import ttk
 7
 8 root = Tk()
 9 root.title("window")
10 root.geometry('500x500')
11 #创建标签
12 var1 = StringVar()
13 l = Label(root, bg='green', fg='yellow',font=('Arial', 12), width=10, textvariable=var1)
14 l.pack()
15 #列表框点击事件
16 def print_lb1():
17     value = lb1.get(lb1.curselection())
18     var1.set(value)
19 #列表框点击按钮
20 b1 = Button(root,text='print selection lb',width=18,height=2,command=print_lb1)
21 b1.pack()
22 #创建Listbox
23 var_lb1 = StringVar()
24 var_lb1.set(('C30','C35','C40'))
25 lb1 = Listbox(root,listvariable = var_lb1)
26 lb1.pack()
27
28 #组合框点击事件
29 def print_cb1():
30     value = cb1.get()
31     var1.set(value)
32 #组合框点击按钮
33 b2 = Button(root,text='print selection cb',width=18,height=2,command=print_cb1)
34 b2.pack()
35 #创建Combobox
36 var_cb1 = StringVar()
37 var_cb1.set('请选择混凝土标号')
38 cb1 = ttk.Combobox(root,textvariable=var_cb1)
39 cb1['values']=['C30','C35','C40']
40 cb1.pack()
41 #事件循环
42 root.mainloop()